1. Pozar, David M., Microwave Engineering, 4th Ed., John Wiley & Sons, Hoboken, NJ, USA, 2012.
2. Sazegar, Mohsen, Yuliang Zheng, Holger Maune, Christian Damm, Xianghui Zhou, Joachim Binder, and Rolf Jakoby, "Low-cost phased-array antenna using compact tunable phase shifters based on ferroelectric ceramics," IEEE Transactions on Microwave Theory and Techniques, Vol. 59, No. 5, 1265-1273, May 2011.
doi:10.1109/TMTT.2010.2103092
3. Lin, Chien-San, Sheng-Fuh Chang, Chia-Chan Chang, and Yi-Hao Shu, "Design of a reflection-type phase shifter with wide relative phase shift and constant insertion loss," IEEE Transactions on Microwave Theory and Techniques, Vol. 55, No. 9, 1862-1868, Sep. 2007.
doi:10.1109/TMTT.2007.903346
4. Chan, Erwin H. W., WeiWei Zhang, and Robert A. Minasian, "Photonic RF phase shifter based on optical carrier and RF modulation sidebands amplitude and phase control," Journal of Lightwave Technology, Vol. 30, No. 23, 3672-3678, Dec. 2012.
doi:10.1109/JLT.2012.2224093
5. Shehata, Rania Eid A., Moataza Hindy, Hamdi Elmekati, and Ayman Mohamed Fekry Elboushi, "Design of a beam-steering metamaterial inspired LPDA array for 5G applications," Progress In Electromagnetics Research M, Vol. 117, 151-161, 2023.
doi:10.2528/PIERM23042406
6. Sellal, K., L. Talbi, T. A. Denidni, and J. Lebel, "Design and implementation of a substrate integrated waveguide phase shifter," IET Microwaves, Antennas & Propagation, Vol. 2, No. 2, 194-199, 2008.
7. Peng, Hao, Xinlin Xia, Serioja Ovidiu Tatu, and Tao Yang, "An improved broadband SIW phase shifter with embedded air strips," Progress In Electromagnetics Research C, Vol. 67, 185-192, 2016.
8. Liu, Qiang, Yuan'an Liu, Yongle Wu, Jun-Yu Shen, Shulan Li, Cuiping Yu, and Ming Su, "A substrate integrated waveguide to substrate integrated coaxial line transition," Progress In Electromagnetics Research C, Vol. 36, 249-259, 2013.
9. Schiffman, B. M., "A new class of broad-band microwave 90-degree phase shifters," IRE Transactions on Microwave Theory and Techniques, Vol. 6, No. 2, 232-237, 1958.
10. Guo, Yong-Xin, Zhen-Yu Zhang, and Ling Chuen Ong, "Improved wide-band Schiffman phase shifter," IEEE Transactions on Microwave Theory and Techniques, Vol. 54, No. 3, 1196-1200, Mar. 2006.
doi:10.1109/TMTT.2005.864105
11. Wang, Y., M. E. Bialkowski, and A. M. Abbosh, "Double microstrip-slot transitions for broadband ±90˚ microstrip phase shifters," IEEE Microwave and Wireless Components Letters, Vol. 22, No. 2, 58-60, 2012.
doi:10.1109/LMWC.2011.2181348
12. Yeung, Sai Ho, Zicong Mei, Tapan Kumar Sarkar, and Magdalena Salazar-Palma, "Design and testing of a single-layer microstrip ultrawideband 90° differential phase shifter," IEEE Microwave and Wireless Components Letters, Vol. 23, No. 3, 122-124, 2013.
13. Wang, Jian-Xiao, Lin Yang, Yue Liu, Yi Wang, and Shu-Xi Gong, "Design of a wideband differential phase shifter with the application of genetic algorithm," Progress In Electromagnetics Research Letters, Vol. 48, 45-49, 2014.
14. Ravelo, B., Marc Le Roy, and A. Pérennec, "Application of negative group delay active circuits to the design of broadband and constant phase shifters," Microwave and Optical Technology Letters, Vol. 50, No. 12, 3078-3080, 2008.
doi:10.1002/mop.23883
15. Keser, Sinan and Mo Mojahedi, "Broadband negative group delay microstrip phase shifter design," 2009 IEEE Antennas and Propagation Society International Symposium, 1-4, North Charleston, SC, USA, 2009.